Hey Alan,
as long as you have not created a g-code toolpath of your own, uploaded and selected it in the machine, and probed or manually set your workpiece zero coordinate, this is not an issue and can (must) be safely ignored.
If you have created a g-code toolpath of your own, uploaded and selected it in the machine, and probed or manually set workpiece zero coordinate, then this error tells you that your g-code toolpath wants the machine to mill outside its workarea, which will in no case go. In this case, either your 3D model is too big, or you’ve probed or set manually your workpiece zero coordinate in the wrong position.
This support document may help you: